Retirement Plans - Significant Assumptions Used to Determine Projected Benefit Obligations (Detail) |
Mar. 31, 2017 |
Mar. 31, 2016 |
|---|---|---|
| United States Plans | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 4.10% | 3.90% |
| International Plans | Minimum | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 1.50% | 1.80% |
| Rate of compensation increase | 1.50% | 1.50% |
| International Plans | Maximum | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 3.50% | 3.70% |
| Rate of compensation increase | 4.00% | 4.00% |